Author:
Rott Helmut,Rack Wolfgang,Nagler Thomas,Skvarca Pedro
Abstract
The areal changes of the northern Larsen Ite Shelf (LIS), Antarctic
Peninsula, between March 1986 and March 1997 have been analyzed, based on
synthetic aperture radar images of the European remote-sensing satellites ERS-1
and ERS-2 and on Landsat images. This analysis is complemented by data on ice
motion and surface mass balance which have been obtained during several field
campaigns since the early 1980s. After a period of retreat, coinciding with
atmospheric warming and with decreasing net accumulation at the surface due to
melt losses, the two northernmost sections of LIS disintegrated almost completely
within a few days in January 1995. Recent observations of the ice-shelf section
north of Jason Peninsula, which is presently the northernmost section of LIS, show
increased summer melt and intensification of the rifting processes, probably
causing accelerated retreat of this section in the near future. The retreat and
the disintegration event of LIS indicate high sensitivity of ice shelves to
prolonged perturbations of the mass balance.
Publisher
International Glaciological Society
Cited by
63 articles.
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